Mathematics, 11.05.2021 05:50, 4804341040

A plumber charges $30 an hour plus cost of parts. The parts to fix Ben’s sink cost $97. The plumber gives Ben a bill for $217. How long did it take the plumber to fix Ben’s sink?

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A plumber charges $30 an hour plus cost of parts. The parts to fix Ben’s sink cost $97. The plumber...